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HTTP Variables

Action Result Variables​

The following variables are made available for use in subsequent expressions and CEL interpolations after the action has run. Variable values will only apply to the last action execution, results are not concatenated.

Add Headers​

NameTypeDescription
actions.ngrok.add_headers.headers_addedmap[string]stringThe headers and associated values that were added by the action.

Compress Response​

NameTypeDescription
actions.ngrok.compress.already_compressedbooleanWill be true if the body was already encoded.
actions.ngrok.compress.negotiated_algorithmstringThe algorithm selected by the action.

JWT Validation​

NameTypeDescription
actions.ngrok.jwt_validation.tokens[]JWTThe JWTs processed by the action.
actions.ngrok.jwt_validation.tokens[i].headermap[string]stringThe header portion of the JWT, parsed into a key value map.
actions.ngrok.jwt_validation.tokens[i].locationstringThe location in the request where the JWT was included.
actions.ngrok.jwt_validation.tokens[i].location_propertystringThe name of the header or body field where the JWT was included.
actions.ngrok.jwt_validation.tokens[i].payloadmap[string]stringThe payload portion of the JWT, parsed into a key value map.
actions.ngrok.jwt_validation.tokens[i].signaturestringThe signature portion of the JWT, in base64 encoded format.
actions.ngrok.jwt_validation.tokens[i].verifiedbooleanSet to true if token was verified.
actions.ngrok.jwt_validation.error.codestringCode for an error that occurred during the invocation of an action.
actions.ngrok.jwt_validation.error.messagestringMessage for an error that occurred during the invocation of an action.

Log​

NameTypeDescription
actions.ngrok.log.metadatamap[string]stringThe key-value map of metadata that was logged.

Rate Limit​

NameTypeDescription
actions.ngrok.rate_limit.bucket_keystringThe key used for bucketing requests.
actions.ngrok.rate_limit.limitedbooleanTrue if the request was limited.
actions.ngrok.rate_limit.error.codestringCode for an error that occurred during the invocation of an action.
actions.ngrok.rate_limit.error.messagestringMessage for an error that occurred during the invocation of an action.

Redirect​

NameTypeDescription
actions.ngrok.redirect.matches[]stringList of matched elements.
actions.ngrok.redirect.urlstringThe resulting URL sent back for redirect.
actions.ngrok.redirect.error.codestringCode for an error that occurred during the invocation of an action.
actions.ngrok.redirect.error.messagestringMessage for an error that occurred during the invocation of an action.

Remove Headers​

NameTypeDescription
actions.ngrok.remove_headers.headers_removed[]stringList of headers that were removed by the action.

Restrict IPs​

NameTypeDescription
actions.ngrok.restrict_ips.actionstringThe resulting action for this action execution. Supported values are either allow or deny.
actions.ngrok.restrict_ips.matched_cidrstringThe CIDR that matched for the incoming client ip. This may be empty.
actions.ngrok.restrict_ips.error.codestringCode for an error that occurred during the invocation of an action.
actions.ngrok.restrict_ips.error.messagestringMessage for an error that occurred during the invocation of an action.

URL Rewrite​

NameTypeDescription
actions.ngrok.url_rewrite.matches[]stringList of matched elements.
actions.ngrok.url_rewrite.urlstringThe resulting URL after it was re-written.
actions.ngrok.url_rewrite.error.codestringCode for an error that occurred during the invocation of an action.
actions.ngrok.url_rewrite.error.messagestringMessage for an error that occurred during the invocation of an action.

Connection Variables​

The following variables are available under the conn namespace:

NameTypeDescription
conn.bytes_inint64The number of bytes entering the endpoint from the client.
conn.bytes_outint64The number of bytes leaving an endpoint to the client.
conn.client_ipstringSource IP of the connection to the ngrok endpoint.
conn.client_portint32Source port of the connection to the ngrok endpoint.
conn.server_ipstringThe IP that this connection was established on.
conn.server_portint32The port that this connection was established on.
conn.ts.starttimestampTimestamp when the connection to ngrok was started.

conn.bytes_in​

The number of bytes entering the endpoint from the client.

# snippet
---
expressions:
  - "conn.bytes_in > 1000"

conn.bytes_out​

The number of bytes leaving an endpoint to the client.

# snippet
---
expressions:
  - "conn.bytes_out > 1000"

conn.client_ip​

Source IP of the connection to the ngrok endpoint.

# snippet
---
expressions:
  - "conn.client_ip in ['::1', '127.0.0.1']"

conn.client_port​

Source port of the connection to the ngrok endpoint.

# snippet
---
expressions:
  - "conn.client_port == 80"

conn.server_ip​

The IP that this connection was established on.

# snippet
---
expressions:
  - "conn.server_ip == '192.168.1.1'"

conn.server_port​

The port that this connection was established on.

# snippet
---
expressions:
  - "conn.server_port == 80"

conn.ts.start​

Timestamp when the connection to ngrok was started.

# snippet
---
expressions:
  - "conn.ts.start > timestamp('2023-12-31T00:00:00Z')"

Connection Geo Variables​

The following variables are available under the conn.geo namespace:

NameTypeDescription
conn.geo.citystringThe name of the city, in EN, where the conn.client_ip is likely to originate.
conn.geo.countrystringThe name of the country, in EN, where the conn.client_ip is likely to originate.
conn.geo.country_codestringThe two-letter ISO country code where the conn.client_ip is likely to originate.
conn.geo.latitudestringThe approximate latitude where the conn.client_ip is likely to originate.
conn.geo.longitudestringThe approximate longitude where the conn.client_ip is likely to originate.
conn.geo.radiusstringThe radius in kilometers around the latitude and longitude where the conn.client_ip is likely to originate.
conn.geo.subdivisionstringThe name of the subdivision, in EN, where the conn.client_ip is likely to originate.

conn.geo.city​

The name of the city, in EN, where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.city == 'Strongsville'"

conn.geo.country​

The name of the country, in EN, where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.country == 'United States'"

conn.geo.country_code​

The two-letter ISO country code where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.country_code != 'US'"

conn.geo.latitude​

The approximate latitude where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "double(conn.geo.latitude) >= 45.0"

conn.geo.longitude​

The approximate longitude where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "double(conn.geo.longitude) <= -93.0"

conn.geo.radius​

The radius in kilometers around the latitude and longitude where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.radius <= '5'"

conn.geo.subdivision​

The name of the subdivision, in EN, where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.subdivision == 'California'"

Connection TLS Variables​

The following variables are available under the conn.tls namespace:

NameTypeDescription
conn.tls.cipher_suitestringThe cipher suite selected during the TLS handshake.
conn.tls.snistringThe hostname included in the ClientHello message via the SNI extension.
conn.tls.versionstringThe version of the TLS protocol used between the client and the ngrok edge.

conn.tls.cipher_suite​

The cipher suite selected during the TLS handshake.

# snippet
---
expressions:
  - "conn.tls.cipher_suite == 'TLS_AES_128_GCM_SHA256'"

conn.tls.sni​

The hostname included in the ClientHello message via the SNI extension.

# snippet
---
expressions:
  - "conn.tls.sni == 'client.example.com'"

conn.tls.version​

The version of the TLS protocol used between the client and the ngrok edge.

# snippet
---
expressions:
  - "conn.tls.version == '1.3'"

Connection TLS Client Variables​

The following variables are available under the conn.tls.client namespace:

NameTypeDescription
conn.tls.client.extensions[]ExtensionAdditional information added to the certificate.
conn.tls.client.extensions[i].idstringThe identifier (OID) that specifies the type of extension.
conn.tls.client.extensions[i].criticalboolTrue if the extension is critical.
conn.tls.client.extensions[i].value[]byteThe data for the extension.
conn.tls.client.issuerstringThe issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.client.issuer.common_namestringCommon name of the issuing authority, usually the domain name.
conn.tls.client.issuer.country[]stringCountry name(s) where the issuing authority is located.
conn.tls.client.issuer.locality[]stringLocality or city of the issuing authority.
conn.tls.client.issuer.organization[]stringName(s) of the organization that issued the certificate.
conn.tls.client.issuer.organizational_unit[]stringDivision of the organization responsible for the certificate.
conn.tls.client.issuer.postal_code[]stringPostal code of the issuing authority.
conn.tls.client.issuer.province[]stringProvince or state of the issuing authority.
conn.tls.client.issuer.street_address[]stringStreet address of the issuing authority.
conn.tls.client.sanstringSubject alternative names of the client certificate.
conn.tls.client.san.dns_names[]stringDNS names in the subject alternative names.
conn.tls.client.san.email_addresses[]stringEmail addresses in the subject alternative names.
conn.tls.client.san.ip_addresses[]stringIP addresses in the subject alternative names.
conn.tls.client.san.uris[]stringURIs in the subject alternative names.
conn.tls.client.serial_numberstringUnique identifier for the certificate.
conn.tls.client.signature_algorithmstringAlgorithm used to sign the certificate.
conn.tls.client.subjectstringThe entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.client.subject.common_namestringCommon name of the subject, usually the domain name.
conn.tls.client.subject.country[]stringCountry name(s) where the subject of the certificate is located.
conn.tls.client.subject.locality[]stringLocality or city where the subject is located.
conn.tls.client.subject.organization[]stringName(s) of the organization to which the subject belongs.
conn.tls.client.subject.organizational_unit[]stringDivision of the organization to which the subject belongs.
conn.tls.client.subject.postal_code[]stringPostal code where the subject is located.
conn.tls.client.subject.province[]stringProvince or state where the subject is located.
conn.tls.client.subject.street_address[]stringStreet address where the subject is located.
conn.tls.client.validity.not_aftertimestampExpiration date and time when the certificate is no longer valid.
conn.tls.client.validity.not_beforetimestampStart date and time when the certificate becomes valid.

conn.tls.client.extensions​

Additional information added to the certificate.

# snippet
---
expressions:
  - "size(conn.tls.client.extensions) > 0"

conn.tls.client.extensions[i].id​

The identifier (OID) that specifies the type of extension.

# snippet
---
expressions:
  - "conn.tls.client.extensions[0].id == '2.5.29.15'"

conn.tls.client.extensions[i].critical​

True if the extension is critical.

# snippet
---
expressions:
  - "conn.tls.client.extensions[0].critical"

conn.tls.client.extensions[i].value​

The data for the extension.

# snippet
---
expressions:
  - "conn.tls.client.extensions[0].value == b'\x03\x02\x05 '"

conn.tls.client.issuer​

The issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.client.issuer == 'CN=E1,O=Let's Encrypt,C=US'"

conn.tls.client.issuer.common_name​

Common name of the issuing authority, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.client.issuer.common_name == 'exampleca.com'"

conn.tls.client.issuer.country​

Country name(s) where the issuing authority is located.

# snippet
---
expressions:
  - "conn.tls.client.issuer.country == ['US']"

conn.tls.client.issuer.locality​

Locality or city of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.locality == ['Mountain View']"

conn.tls.client.issuer.organization​

Name(s) of the organization that issued the certificate.

# snippet
---
expressions:
  - "conn.tls.client.issuer.organization == ['Example CA']"

conn.tls.client.issuer.organizational_unit​

Division of the organization responsible for the certificate.

# snippet
---
expressions:
  - "conn.tls.client.issuer.organizational_unit == ['Certification Authority
    Division']"

conn.tls.client.issuer.postal_code​

Postal code of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.postal_code == ['94043']"

conn.tls.client.issuer.province​

Province or state of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.province == ['California']"

conn.tls.client.issuer.street_address​

Street address of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.street_address == ['1234 Encryption Way']"

conn.tls.client.san​

Subject alternative names of the client certificate.

# snippet
---
expressions:
  - "conn.tls.client.san == 'DNS:www.example.com, DNS:example.com, IP
    Address:192.168.1.1'"

conn.tls.client.san.dns_names​

DNS names in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.dns_names == ['www.example.com', 'example.com']"

conn.tls.client.san.email_addresses​

Email addresses in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.email_addresses == ['ngrok-email1@example.com',
    'ngrok-email2@example.com']"

conn.tls.client.san.ip_addresses​

IP addresses in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.ip_addresses == ['192.168.1.1']"

conn.tls.client.san.uris​

URIs in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.uris == ['https://example.com/example']"

conn.tls.client.serial_number​

Unique identifier for the certificate.

# snippet
---
expressions:
  - "conn.tls.client.serial_number == 'b53017e79d4a5208b314a55d3574e0a8'"

conn.tls.client.signature_algorithm​

Algorithm used to sign the certificate.

# snippet
---
expressions:
  - "conn.tls.client.signature_algorithm == 'SHA256-RSA'"

conn.tls.client.subject​

The entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.client.subject == 'CN=www.example.com'"

conn.tls.client.subject.common_name​

Common name of the subject, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.client.subject.common_name == 'www.example.com'"

conn.tls.client.subject.country​

Country name(s) where the subject of the certificate is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.country == ['US']"

conn.tls.client.subject.locality​

Locality or city where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.locality == ['Mountain View']"

conn.tls.client.subject.organization​

Name(s) of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.client.subject.organization == ['Example Corp']"

conn.tls.client.subject.organizational_unit​

Division of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.client.subject.organizational_unit == ['Web Services']"

conn.tls.client.subject.postal_code​

Postal code where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.postal_code == ['94043']"

conn.tls.client.subject.province​

Province or state where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.province == ['California']"

conn.tls.client.subject.street_address​

Street address where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.street_address == ['1234 Secure Blvd']"

conn.tls.client.validity.not_after​

Expiration date and time when the certificate is no longer valid.

# snippet
---
expressions:
  - "conn.tls.client.validity.not_after == timestamp('2023-01-01T00:00:00Z')"

conn.tls.client.validity.not_before​

Start date and time when the certificate becomes valid.

# snippet
---
expressions:
  - "conn.tls.client.validity.not_before == timestamp('2020-01-01T00:00:00Z')"

Connection TLS Server Variables​

The following variables are available under the conn.tls.server namespace:

NameTypeDescription
conn.tls.server.extensions[]ExtensionAdditional information added to the certificate.
conn.tls.server.extensions[i].idstringThe identifier that specifies the type of extension.
conn.tls.server.extensions[i].criticalboolTrue if the extension is critical.
conn.tls.server.extensions[i].value[]byteThe data for the extension.
conn.tls.server.issuerstringThe issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.server.issuer.common_namestringCommon name of the issuing authority, usually the domain name.
conn.tls.server.issuer.country[]stringCountry name(s) where the issuing authority is located.
conn.tls.server.issuer.locality[]stringLocality or city of the issuing authority.
conn.tls.server.issuer.organization[]stringName(s) of the organization that issued the certificate.
conn.tls.server.issuer.organizational_unit[]stringDivision of the organization responsible for the certificate.
conn.tls.server.issuer.postal_code[]stringPostal code of the issuing authority.
conn.tls.server.issuer.province[]stringProvince or state of the issuing authority.
conn.tls.server.issuer.street_address[]stringStreet address of the issuing authority.
conn.tls.server.sanstringSubject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.dns_names[]stringDNS names in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.email_addresses[]stringEmail addresses in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.ip_addresses[]stringIP addresses in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.uris[]stringURIs in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.serial_numberstringUnique identifier for the certificate.
conn.tls.server.signature_algorithmstringAlgorithm used to sign the certificate.
conn.tls.server.subjectstringThe entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.server.subject.common_namestringCommon name of the subject, usually the domain name.
conn.tls.server.subject.country[]stringCountry name(s) where the subject of the certificate is located.
conn.tls.server.subject.locality[]stringLocality or city where the subject is located.
conn.tls.server.subject.organization[]stringName(s) of the organization to which the subject belongs.
conn.tls.server.subject.organizational_unit[]stringDivision of the organization to which the subject belongs.
conn.tls.server.subject.postal_code[]stringPostal code where the subject is located.
conn.tls.server.subject.province[]stringProvince or state where the subject is located.
conn.tls.server.subject.street_address[]stringStreet address where the subject is located.
conn.tls.server.validity.not_aftertimestampExpiration date and time when the certificate is no longer valid.
conn.tls.server.validity.not_beforetimestampStart date and time when the certificate becomes valid.

conn.tls.server.extensions​

Additional information added to the certificate.

# snippet
---
expressions:
  - "size(conn.tls.server.extensions) > 0"

conn.tls.server.extensions[i].id​

The identifier that specifies the type of extension.

# snippet
---
expressions:
  - "conn.tls.server.extensions[0].id == '2.5.29.15'"

conn.tls.server.extensions[i].critical​

True if the extension is critical.

# snippet
---
expressions:
  - "conn.tls.server.extensions[0].critical"

conn.tls.server.extensions[i].value​

The data for the extension.

# snippet
---
expressions:
  - "conn.tls.server.extensions[0].value == b'\x03\x02\x05 '"

conn.tls.server.issuer​

The issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.server.issuer == 'CN=E1,O=Let's Encrypt,C=US'"

conn.tls.server.issuer.common_name​

Common name of the issuing authority, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.server.issuer.common_name == 'exampleca.com'"

conn.tls.server.issuer.country​

Country name(s) where the issuing authority is located.

# snippet
---
expressions:
  - "conn.tls.server.issuer.country == ['US']"

conn.tls.server.issuer.locality​

Locality or city of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.locality == ['Mountain View']"

conn.tls.server.issuer.organization​

Name(s) of the organization that issued the certificate.

# snippet
---
expressions:
  - "conn.tls.server.issuer.organization == ['Example CA']"

conn.tls.server.issuer.organizational_unit​

Division of the organization responsible for the certificate.

# snippet
---
expressions:
  - "conn.tls.server.issuer.organizational_unit == ['Certification Authority
    Division']"

conn.tls.server.issuer.postal_code​

Postal code of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.postal_code == ['94043']"

conn.tls.server.issuer.province​

Province or state of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.province == ['California']"

conn.tls.server.issuer.street_address​

Street address of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.street_address == ['1234 Encryption Way']"

conn.tls.server.san​

Subject alternative names of the server certificate of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san == 'DNS:www.example.com, DNS:example.com, IP
    Address:192.168.1.1'"

conn.tls.server.san.dns_names​

DNS names in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.dns_names == ['ngrok-dns.com', 'ngrok-dns2.com']"

conn.tls.server.san.email_addresses​

Email addresses in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.email_addresses == ['ngrok-email1@example.com',
    'ngrok-email2@example.com']"

conn.tls.server.san.ip_addresses​

IP addresses in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.ip_addresses == ['192.168.1.1']"

conn.tls.server.san.uris​

URIs in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.uris == ['https://example.com/example']"

conn.tls.server.serial_number​

Unique identifier for the certificate.

# snippet
---
expressions:
  - "conn.tls.server.serial_number == 'b53017e79d4a5208b314a55d3574e0a8'"

conn.tls.server.signature_algorithm​

Algorithm used to sign the certificate.

# snippet
---
expressions:
  - "conn.tls.server.signature_algorithm == 'SHA256-RSA'"

conn.tls.server.subject​

The entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.server.subject == 'CN=www.example.com'"

conn.tls.server.subject.common_name​

Common name of the subject, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.server.subject.common_name == 'ngrok-server.example.com'"

conn.tls.server.subject.country​

Country name(s) where the subject of the certificate is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.country == ['US']"

conn.tls.server.subject.locality​

Locality or city where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.locality == ['Mountain View']"

conn.tls.server.subject.organization​

Name(s) of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.server.subject.organization == ['Example Corp']"

conn.tls.server.subject.organizational_unit​

Division of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.server.subject.organizational_unit == ['Web Services']"

conn.tls.server.subject.postal_code​

Postal code where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.postal_code == ['94043']"

conn.tls.server.subject.province​

Province or state where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.province == ['California']"

conn.tls.server.subject.street_address​

Street address where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.street_address == ['1234 Secure Blvd']"

conn.tls.server.validity.not_after​

Expiration date and time when the certificate is no longer valid.

# snippet
---
expressions:
  - "conn.tls.server.validity.not_after > timestamp('2023-01-01T00:00:00Z')"

conn.tls.server.validity.not_before​

Start date and time when the certificate becomes valid.

# snippet
---
expressions:
  - "conn.tls.server.validity.not_before < timestamp('2020-01-01T00:00:00Z')"

Endpoint Variables​

The following variables are available under the endpoint namespace:

NameTypeDescription
endpoint.addrstringThe address for this endpoint.
endpoint.hoststringThe hostname for this endpoint.
endpoint.idstringThe endpoint that serviced this connection.
endpoint.portint32The port for this endpoint.
endpoint.protocolstringThe protocol for this endpoint. Current supported values are http, https, tcp, and tls.
endpoint.urlstringThe url for this endpoint.

endpoint.addr​

The address for this endpoint.

# snippet
---
expressions:
  - "endpoint.addr == 'my-subdomain.ngrok.app:443'"

endpoint.host​

The hostname for this endpoint.

# snippet
---
expressions:
  - "endpoint.host == 'my-subdomain.ngrok.app'"

endpoint.id​

The id for this endpoint.

# snippet
---
expressions:
  - "endpoint.id == 'ep_2iL8LRbQilSCKYjaslRoqBwJcfT'"

endpoint.port​

The port for this endpoint.

# snippet
---
expressions:
  - "endpoint.port == 443"

endpoint.protocol​

The protocol for this endpoint. Current supported values are http, https, tcp, and tls.

# snippet
---
expressions:
  - "endpoint.protocol == 'https'"

endpoint.url​

The url for this endpoint.

# snippet
---
expressions:
  - "endpoint.url == 'https://my-subdomain.ngrok.app'"

Request Variables​

The following variables are available under the req namespace:

NameTypeDescription
req.content_encodinglist[string]The encodings set in the Content-Encoding header for this request.
req.content_lengthint64The content length of the body in bytes. This may not be present if the request does not contain a body or if the client does not specify a content length because they are streaming the body.
req.content_typestringThe media type set in the Content-Type header for this request.
req.content_type.parametersmap[string]stringThe parameters set in the Content-Type header for this request.
req.content_type.rawstringThe value of the Content-Type header for this request.
req.cookiesmap[string][]cookieThe HTTP cookie objects included in this request. If there are multiple cookies with the same name, they will be ordered as specified in the Cookie header.
req.cookies[k][i].namestringThe name of the cookie.
req.cookies[k][i].valuestringThe value of the cookie.
req.headersmap[string][]stringThe request headers parsed as a map of lower-case names to values.
req.hoststringThe value of the host header field for this request.
req.locationstringThe value of the Location header for this request.
req.methodstringThe method for this request.
req.trailersmap[string][]stringThe request trailers parsed as a map of lower-case names to values.
req.ts.body_receivedtimestampThe timestamp when ngrok received the body of the request. This may not be present if the request does not contain a body.
req.ts.header_receivedtimestampThe timestamp when ngrok received the header of the request.
req.urlstringThe normalized full URL for this request.
req.url.authoritystringThe authority portion of the URL.
req.url.hoststringThe hostname portion of the host for this request.
req.url.pathstringThe path for this request including the leading forward slash.
req.url.portint32The port portion of the URL. This may not be present if the URL does not explicitly specify a port.
req.url.querystringThe full query string for this request excluding the leading question mark.
req.url.query_paramsmap[string][]stringThe request query string parsed as a map of names to values.
req.url.rawstringThe un-normalized full URL for this request.
req.url.raw_pathstringThe un-normalized path including the leading slash for this request.
req.url.schemestringThe scheme for this request.
req.url.uristringThe URI (path and query) portion of the URL.
req.url.user_passwordstringThe user:password portion of the URL.
req.user_agentstringThe value of the User-Agent header for this request.
req.versionstringThe HTTP version for this request.

req.content_encoding​

The encoding set in the Content-Encoding header for this request.

# snippet
---
expressions:
  - "req.content_encoding[0] == 'br'"

req.content_length​

The content length of the body in bytes. This may not be present if the request does not contain a body or if the client does not specify a content length because they are streaming the body.

# snippet
---
expressions:
  - "req.content_length > 10000000"

req.content_type​

The media type set in the Content-Type header for this request.

# snippet
---
expressions:
  - "req.content_type == 'application/json'"

req.content_type.parameters​

The parameters set in the Content-Type header for this request.

# snippet
---
expressions:
  - "req.content_type.parameters['charset'] == 'utf-8'"

req.content_type.raw​

The value of the Content-Type header for this request.

# snippet
---
expressions:
  - "req.content_type.raw == 'application/json; charset=utf-8'"

req.cookies​

The HTTP cookie objects included in this request. If there are multiple cookies with the same name, they will be ordered as specified in the Cookie header.

# snippet
---
expressions:
  - "size(req.cookies) > 0"

req.cookies[k][i].name​

The name of the cookie.

# snippet
---
expressions:
  - "req.cookies['sessionId'][0].name == 'sessionId'"

req.cookies[k][i].value​

The value of the cookie.

# snippet
---
expressions:
  - "req.cookies['sessionId'][0].value > 'value'"

req.headers​

The request headers parsed as a map of lower-case names to values.

# snippet
---
expressions:
  - "'Fizz' in req.headers['baz']"

req.host​

The value of the host header field value for this request.

# snippet
---
expressions:
  - "req.host == 'nba.com'"

req.location​

The value of the Location header for this request.

# snippet
---
expressions:
  - "req.location == '/index.html'"

req.method​

The method for this request.

# snippet
---
expressions:
  - "req.method == 'POST' || req.method == 'PUT'"

req.trailers​

The request trailers parsed as a map of lower-case names to values.

# snippet
---
expressions:
  - "'Fizz' in req.trailers['baz']"

req.ts.body_received​

The timestamp when ngrok received the body of the request. This may not be present if the request does not contain a body.

# snippet
---
expressions:
  - "req.ts.body_received > timestamp('2023-12-31T00:00:00Z')"

req.ts.header_received​

The timestamp when ngrok received the header of the request.

# snippet
---
expressions:
  - "req.ts.header_received > timestamp('2023-12-31T00:00:00Z')"

req.url​

The normalized full URL for this request.

# snippet
---
expressions:
  - "req.url == 'https://nba.com/')"

req.url.authority​

The authority portion of the URL.

# snippet
---
expressions:
  - "req.url.authority == 'user:password@nba.com'"

req.url.host​

The hostname portion of the host for this request.

# snippet
---
expressions:
  - "req.url.host == 'nba.com'"

req.url.path​

The path for this request including the leading forward slash.

# snippet
---
expressions:
  - "req.url.path.startsWith('/foo')"

req.url.port​

The port portion of the URL. This may not be present if the URL does not explicitly specify a port.

# snippet
---
expressions:
  - "req.url.port == 443"

req.url.query​

The full query string for this request excluding the leading question mark.

# snippet
---
expressions:
  - "req.url.query == 'number=23&name=jordan'"

req.url.query_params​

The request query string parsed as a map of names to values.

# snippet
---
expressions:
  - "'bar' in req.url.query_params['foo']"

req.url.raw​

The un-normalized full URL for this request.

# snippet
---
expressions:
  - "req.url.raw.includes('/foo')"

req.url.raw_path​

The un-normalized path including the leading slash for this request.

# snippet
---
expressions:
  - "req.url.raw_path.startsWith('/foo')"

req.url.scheme​

The scheme for this request.

# snippet
---
expressions:
  - "req.url.scheme == 'https'"

req.url.uri​

The URI (path and query) portion of the URL.

# snippet
---
expressions:
  - "req.url.uri.contains('/api/players?number=23&name=jordan')"

req.url.user_password​

The user:password portion of the URL.

# snippet
---
expressions:
  - "req.url.user_password == 'user:password'"

req.user_agent​

The value of the User-Agent header for this request.

# snippet
---
expressions:
  - "req.user_agent.contains('curl')"

req.version​

The HTTP version for this request.

# snippet
---
expressions:
  - "req.version == 'HTTP/2.0"

Response Variables​

The following variables are available under the res namespace:

NameTypeDescription
res.content_encodinglist[string]The encoding set in the Content-Encoding header for this response.
res.content_lengthint64The length of the content associated with the response.
res.content_typestringThe media type set in the Content-Type header for this response.
res.content_type.parametersmap[string]stringThe parameters set in the Content-Type header for this response.
res.content_type.rawstringThe Content-Type header for this response as a string.
res.cookiesmap[string][]cookieThe HTTP cookie objects included in this response. If there are multiple cookies with the same name, they will be ordered by path length, with longest path first.
res.cookies[k][i].domainstringThe value of the Domain attribute of the cookie.
res.cookies[k][i].expirestimestampThe value of the Expires attribute of the cookie.
res.cookies[k][i].http_onlybooleanThe value of the HttpOnly attribute of the cookie.
res.cookies[k][i].max_agedurationThe value of the MaxAge attribute of the cookie.
res.cookies[k][i].namestringThe name of the cookie.
res.cookies[k][i].pathstringThe value of the Path attribute of the cookie.
res.cookies[k][i].same_sitestringThe value of the SameSite attribute of the cookie.
res.cookies[k][i].securebooleanThe value of the Secure attribute of the cookie.
res.cookies[k][i].unparsed_attributesmap[string]stringAny non-standard attributes of the cookie parsed as a map of names to values .
res.cookies[k][i].valuestringThe value of the cookie.
res.headersmap[string][]stringThe response headers parsed as a map of lower-case names to values.
res.locationstringThe Location header value of this response.
res.status_codeint32The status code of this response.
res.trailersmap[string][]stringThe response trailers parsed as a map of lower-case names to values.

res.content_encoding​

The encoding set in the Content-Encoding header for this response.

# snippet
---
expressions:
  - "res.content_encoding[0] == 'br'"

res.content_length​

The length of the content associated with the response.

# snippet
---
expressions:
  - "res.content_length != 0"

res.content_type​

The media type set in the Content-Type header for this response.

# snippet
---
expressions:
  - "res.content_type == 'application/json'"

res.content_type.parameters​

The parameters set in the Content-Type header for this response.

# snippet
---
expressions:
  - "res.content_type.parameters['charset'] == 'utf-8'"

res.content_type.raw​

The Content-Type header for this response as a string.

# snippet
---
expressions:
  - "res.content_type.raw == 'application/json; charset=utf-8'"

res.cookies​

The HTTP cookie objects included in this response. If there are multiple cookies with the same name, they will be ordered by path length, with longest path first.

# snippet
---
expressions:
  - "size(res.cookies) > 0"

res.cookies[k][i].domain​

The value of the Domain attribute of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].domain == 'nba.com'"

res.cookies[k][i].expires​

The value of the Expires attribute of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].expires > timestamp(time.now)"

res.cookies[k][i].http_only​

The value of the HttpOnly attribute of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].http_only"

res.cookies[k][i].max_age​

The value of the MaxAge attribute of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].max_age > duration('24h')"

res.cookies[k][i].name​

The name of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].name == 'sessionId'"

res.cookies[k][i].path​

The value of the Path attribute of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].path == '/"

res.cookies[k][i].same_site​

The value of the SameSite attribute of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].same_site"

res.cookies[k][i].secure​

The value of the Secure attribute of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].secure"

res.cookies[k][i].unparsed_attributes​

Any non-standard attributes of the cookie parsed as a map of names to values.

# snippet
---
expressions:
  - "size(res.cookies['sessionId'][0].unparsed_attributes) > 0"

res.cookies[k][i].value​

The value of the cookie.

# snippet
---
expressions:
  - "res.cookies['sessionId'][0].value > 'value'"

res.headers​

The response headers parsed as a map of lower-case names to values.

# snippet
---
expressions:
  - "'Fizz' in res.headers['baz']"

res.location​

The location header value of the response.

# snippet
---
expressions:
  - "res.location == '/index.html'"

res.status_code​

The status code of this response.

# snippet
---
expressions:
  - "res.status_code >= 300"

res.trailers​

The response trailers parsed as a map of lower-case names to values.

# snippet
---
expressions:
  - "'fizz' in res.trailers['baz']"

Time variables​

The following variables are available under the time namespace:

NameTypeDescription
time.nowstringThe current UTC time in RFC3339 format.

time.now​

The current UTC time in RFC3339 format.

# snippet
---
expressions:
  - "conn.ts.end < timestamp(time.now)"